This sequence of photos by Bob Brett provides a virtual tour of the magic of spring as it arrives to Portola Redwoods State Park and its forest floor.

[Note that of the hundreds of species of wildflowers in the different landscape habitats across California, there are some I do not instantly recognize, of course; if you can ID any I am unsure of, shoot me an e-mail at tstienstra@sfchronicle.com, and I'll post it. Thanks.]

There’s a catch to this photo adventure, and this is it: Portola Redwoods is still on the July 1 closure list developed by the California State Department of Parks and Recreation.

Portola Redwoods is located on the slopes and canyons west of Skyline on the South Peninsula and is linked by trails to Big Basin Redwoods State Park, and nearby Memorial and Pescadero Creek County Parks. It spans 2,800 acres with a network of great hiking trails, a bike route, and the spectacular and remote Peters Creek Grove of old-growth redwoods.

To close Portola Redwoods would create a giant hole and missing link in this matrix of gorgeous redwood parks.

The Save the Redwood League and P.O.S.T. (as in Peninsula Open Space Trust) are considering their commitment to helping save Portola Redwoods State Park from closing, but have not yet committed. Time is running out.

Portola Foundation: The Portola and Castle Rock Foundation, a 501(c)(3) Foundation, is the official cooperating association for both parks. The mission is to keep these two park jewels open. Go to: http://www.portolaandcastlerockfound.org.

Fundraiser event: Thomas Fogarty Winery will host a fundraise on Friday, May 4, 6 p.m. to 9 p.m., to raise money to ensure that Portola Redwoods and Castle Rock will remain open despite their announced closure on July 1. Go to: